It's Lincoln who changed the status quo and rebelled against every normal human instinct that civilization insisted that slavery was necessary and morally justifiable.

Uh.. Lincoln suspended habeus corpus, arrested people who spoke out too much against the war, and generally exceeded his constitutional powers during the war.

Had he lost that war, he would've been remembered as a something of a tyrant I'm sure. Victory does forgive a lot of things though, so we have a marble statue of him featured prominently in our nation's capital.

Wilson and FDR did far worse things domestically during war, and they had less reason to, since the existence of the country itself wasn't at issue like it was during the ACW.

You're right. They also won. Winston Churchill had a hell of a point when he said, "History shall be kind to me for I intend to write it."